Some mining families resorted to scavenging for coal on slag heaps, a desperate move as most of the "slag" was very dangerous and liable to tip.

一些矿工家庭靠捡矿渣堆中的煤块解燃眉之急，这是一个绝望之举，因为大多数“矿渣”十分危险，极易倒塌。

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The stress at star tip of grain was maximal, which is liable to failure.

星尖处的应力最大，是发动机药柱容易失效的部位。

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